| Variables | |
| char * | algo | 
| char * | est_error_pre_2 | 
| char * | est_error_der_2 | 
| char * | est_error_cor_2 | 
| char * | est_error_tot_2 | 
| algo | 
Fields used to check algorithm behavior.
Fields of the form "algo:<type>_<variable_name>" are reserved by the code to allow visualization of some intermediate computational field values.
If the user creates such a field, and the code calls the matching operator, this field will be updated automatically.
Current reserved fields are:
 algo:predicted_velocity  Velocity field after the prediction step, cell-based field of dimension 3. algo:predicted_vel_divergence  Divergence of the velocity field after the prediction step, cell-based field of dimension 1. algo:gradient_pressure  Pressure gradient, cell-based field of dimension 3. algo:gradient_  supplemented with a transported field name Field gradient, cell-based field of dimension 3x the dimension of the corresponding field. algo:gradient_velocity Velocity gradient, cell-based field of dimension 3x3. algo:gradient_pressure_increment  Gradient of the pressure increment solved in the correction step, cell-based field of dimension 3. algo:rij_divergence  Divergence of the Reynolds stress in the momentum equation for Reynolds stress RANS models, cell-based field of dimension 3. algo:rij_production  So called production term in Reynolds stress RANS models, cell-based field of dimension 6. algo:rij_pressure_strain_correlation  So called pressure strain correlation term in Reynolds stress RANS models, cell-based field of dimension 6. algo:rij_buoyancy  So called buoyancy term in Reynolds stress RANS models, cell-based field of dimension 6. algo:tke_production  So called production term in k-epsilon RANS models, cell-based field of dimension 1. algo:tke_buoyancy  So called buoyancy term in k-epsilon RANS models, cell-based field of dimension 1. algo:turbulent_flux_divergence  Divergence of the turbulent flux in the energy equation, cell-based field of dimension 1. algo:grad_clip_factor_<variable_name>  Least-squares gradient clip factor if gradient clipping is activated (scalar field on cells). algo:grad_b_iter_<variable_name>  Number of iterations for convergence of fixed-point algorithm for least-squares boundary gradient of vector and tensor fields. (scalar field on boundary faces). | est_error_cor_2 | 
Error estimator for Navier-Stokes: correction.
The estimator  comes directly from the mass flow calculated with the updated velocity field:
 comes directly from the mass flow calculated with the updated velocity field: 
 
 are taken at the cell centers, the divergence is calculated after projection on the faces.
 are taken at the cell centers, the divergence is calculated after projection on the faces.  represents the Kronecker symbol.
 represents the Kronecker symbol. .
.| est_error_der_2 | 
Error estimator for Navier-Stokes: drift.
The estimator  is based on the following quantity (intrinsic to the code):
 is based on the following quantity (intrinsic to the code): 
 
| est_error_pre_2 | 
Error estimator for Navier-Stokes: prediction.
After the velocity prediction step (yielding  ), the estimator
), the estimator  , local variable calculated at every cell
, local variable calculated at every cell  , is created from
, is created from  , which represents the residual of the equation solved during this step:
, which represents the residual of the equation solved during this step:  and
 and  :
: 
 

 which intrinsicly appears with the norm
 which intrinsicly appears with the norm  .
. . The size of the cell therefore appears in its calculation and induces a weighting effect.
. The size of the cell therefore appears in its calculation and induces a weighting effect. is ideally equal to zero when the reconstruction methods are perfect and the associated system is solved exactly.
 is ideally equal to zero when the reconstruction methods are perfect and the associated system is solved exactly. | est_error_tot_2 | 
Error estimator for Navier-Stokes: total.
The estimator  , local variable calculated at every cell
, local variable calculated at every cell  , is based on the quantity
, is based on the quantity  , which represents the residual of the equation using the updated values of
, which represents the residual of the equation using the updated values of  and
 and  :
: 
 

 expressed at the cell centers (and not taken from the updated mass flow at the faces).
 expressed at the cell centers (and not taken from the updated mass flow at the faces). which intrinsicly appears with the norm
 which intrinsicly appears with the norm  .
. . The size of the cell therefore appears in its calculation and induces a weighting effect.
. The size of the cell therefore appears in its calculation and induces a weighting effect.